Henby e



(No Model.)

H. E. WAITE.

MAGNETO TELEPHONE. v

No. 355,734. I Patented Jan 11, 1887,

UNITED, STAT S PATENT OFFICE.

HENRY E. WAITE, 0E NEW YORK, N. Y., ASSIGNOR To CHARLES F, LIYER MORE, TRUSTEE, OF SAME PLACE. i

MAGNETO-TELEPHONE.

SPECIFICATION forming part of Letters Patent N 0. 355,734, dated January 11, 1887.

Application filed November 3, 1885. Serial No. 181,772; (No model.) I

To all whom it may concern:

Be it known that I, HENRY E. WAITE, a citizen of the United States, and a resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Magneto-Telephones, of which the following is a specification.

My invention relates to magneto-telephones, and has for its object to improve the construction and arrangement of such instruments, whereby they are well adapted for use, being simple of construction; delicate in adjustment, and not liable toget out of order; and it consists in a telephone constructed and arranged substantially as pointed out hereinafter.

In the accompanying drawings, Figure 1 is a perspective view, and Fig. 2 a detail View.

In a case of any desired construction is secured in a well-known manner a permanent magnet, A, substantially of the form showmthat is to say, inthe form of a ring having one of its ends or poles bent or curved inward toward the center of the ring.

In the inner end of the magnet is secured a soft-iron core, B,made adjustable by means of screw-threads or otherwise, and upon the extension of the core below the magnet is placed the usual coil or helix, 0, the terminals of which are adapted to be connected to the linewires. Supported by its edges in the case above the magnet is the diaphragm D, of wood or other non-magnetic materiaLandpver this is the usual mouth or ear piece, E. Connected to the center of the diaphragm is a pin or rod, F, which extends downward through the core, which is made hollow for this purpose, and the lower end of the pin or rod is connected to a spring, G, connected to the magnet or case, and having a tension-adj usting device, g.

The pin is preferably of non-magnetic mao terial, and in that case it is provided with a piece, of soft iron, H, which forms the armature of the magnet, or the spring G may be enlarged or weighted at this part,so that it will form the armature' The pin may, however, be of magnetic material, and the spring to which it is connected being also magnetic and connected to the end or pole of the magnet op- .posite to that throughwhich the core passes,

the core and the pin will be magnetized so as to be of opposite polarities, and delicate changes in the current passing through the coil will be quickly felt and transmitted to the diaphragm.

By this construction it will be seen that a very compact, cheap, and desirable telephone is produced, that is more especially adapted to be used as a receiver, though of course it can be used to some extent as a transmitter.

WVhat I claim is In a magneto-telephone, the combination, with a ring-magnet,ofan adjustable hollow core of soft iron secured to one end of the magnet, a spring connected to the ,other end of the magnet, anon-magnetic diaphragm, and a rod extending through the core connecting the diaphragmand spring, substantially as described. I Intestimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY E. WAITE.

Witnesses:

A. W. RosE, WM. H, WOODHULL. 

